winsafe 0.0.28

Windows API and GUI in safe, idiomatic Rust.
Documentation 
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use crate::msg::*;

/// This trait is enabled with the `gui` feature, and is implemented by the
/// parameters of messages which can be sent. Implemented by
/// [all defined messages](crate::msg).
///
/// Allows the conversion to the generic [`Wm`](crate::msg::Wm) parameters, and
/// also defines the return type of the message.
///
/// Used in functions like [`SendMessage`](crate::HWND::SendMessage) and
/// [`DefWindowProc`](crate::HWND::DefWindowProc).
///
/// Prefer importing this trait through the prelude:
///
/// ```no_run
/// use winsafe::prelude::*;
/// ```
pub trait MsgSend {
	/// The specific type of the value returned by the message.
	type RetType;

	/// Unmarshaling method which converts the generic `isize` return value to
	/// the specific type returned by the message.
	///
	/// # Safety
	///
	/// Return values often involve pointers and require casts, make sure the
	/// conversions are correct.
	#[must_use]
	unsafe fn isize_to_ret(&self, v: isize) -> Self::RetType;

	/// Marshaling method which converts the specific message parameters struct
	/// into the generic [`Wm`](crate::msg::Wm) message struct.
	#[must_use]
	fn as_generic_wm(&mut self) -> Wm;
}

/// This trait is enabled with the `gui` feature, and is implemented by the
/// parameters of messages which can be sent and handled (received).
///
/// Allows the conversion from and to the generic [`Wm`](crate::msg::Wm)
/// parameters, and also defines the return type of the message.
///
/// Prefer importing this trait through the prelude:
///
/// ```no_run
/// use winsafe::prelude::*;
/// ```
pub trait MsgSendRecv: MsgSend {
	/// Unmarshaling method which converts the generic [`Wm`](crate::msg::Wm)
	/// parameters struct into the specific message struct.
	///
	/// # Safety
	///
	/// Message parameters often involve pointers and require casts, make sure
	/// the conversions are correct.
	#[must_use]
	unsafe fn from_generic_wm(parm: Wm) -> Self;
}